Using an isotonic buffer with a pH of 6.8, how many milliliters of purified water should be used to compound the prescription below? Round to one decimal place. Oxytetracycline HCI (E= 0.12) 2% Homatropine hydrobromide (E = 0.17) 1:250 Purified water ad 75 mL Make isotonic and buffer to pH of 6.8 Blank 1 mL of SWFI

Using an isotonic buffer with a pH of 6.8, how many milliliters of purified water should be used to compound the prescription below? Round to one decimal place. Oxytetracycline HCI (E= 0.12) 2% Homatropine hydrobromide (E = 0.17) 1:250 Purified water ad 75 mL Make isotonic and buffer to pH of 6.8 Blank 1 mL of SWFI

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter15: Acid-base Equilibria

Section: Chapter Questions

Problem 13Q: A best buffer has about equal quantities of weak acid and conjugate base present as well as having a...

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A best buffer has about equal quantities of weak acid and conjugate base present as well as having a large concentration of each species present. Explain.
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Enough water is added to the buffer in Question 30 to make the total volume 5.00 L. (a) Calculate the pH of the buffer. (b) Calculate the pH of the buffer after adding 0.0250 mol of HCl to 0.376 L of the buffer. (c) Calculate the pH of the buffer after adding 0.0250 mol of KOH to 0.376 L of the buffer. (d) Compare your answers to Question 30 (a-c) with your answers to (a-c) of this problem. (e) Comment on the effect of dilution on the pH of a buffer and on its buffer capacity. Â